A wave with a frequency of 28 Hz has a wavelength of 6 meters. At what speed will this wave travel?

168m/s

Explanation:

Given parameters:

Frequency  = 28Hz

Wavelength  = 6m

Unknown:

Speed of the the wave travel  = ?

Solution:

To solve this problem, we us the wave - velocity equation:

    Velocity  = Frequency x Wavelength

 Velocity  = 28 x  6  = 168m/s

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.